Healthy-inspired restaurant chain Muscle Maker plans to raise up to $20 million in a Reg A+ IPO by selling 4.2 million shares at $4.75 each, according to its investor website. The company’s Muscle Maker Grill restaurants are both owned and franchised, operating in 53 locations across 14 states. The company plans to increase the number of restaurants by 30% to 50% annually.